safe-read.h revision 7e7bd3dccbfe8f79e25e5c1554b5bc3a9aaca321
/* An interface to read() that retries after interrupts.
Copyright (C) 2002, 2006 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
#define SAFE_READ_ERROR ((size_t) -1)
/* Read up to COUNT bytes at BUF from descriptor FD, retrying if interrupted.
Return the actual number of bytes read, zero for EOF, or SAFE_READ_ERROR
upon error. */
extern size_t safe_read (int fd, void *buf, size_t count);
#ifdef __cplusplus
}
#endif